I separated or dislocated (not sure which one) my shoulder and broke my collarbone 10 years ago. Ever since then there seems to have been some nerve damage. There are some muscles on that side that don't grow quite like the other side. This only becomes apparent when I start lifting and gaining mass (That is, when I'm small/skinny there is not a noticeable difference). I lost a bit of feeling and when I flex my shoulder it kind of spasms a bit. It also looks ripped compared to my other one, although smaller. I find it hard to pull my elbow up and behind my back (Like when using a pool cue for example).
The two muscles that are really lagging behind on that side are
-the lateral head of triceps
And to a lesser degree some upper back muscle of the rotator cuff, and my bicep.
How would you suggest getting these muscles to wake up?
So far I have been doing band pull aparts (I feel something come alive in those muscles when I do them with my hands rotated so that my pinkies are facing up, like indiana jones opening a tomb door), as well as isometric holds in lateral raise and dumbbell kickback poses (just on lagging side). I am going strictly on trying to innervate those muscles and get some MMC with them, but am not sure how to best program this sort of "recovery."